As far as I can tell no one has asked this question before, so forgive me if they have.

This also assumes the character here does not have an extra attack, so they are probably level 2 or 3 in exclusively fighter. I do not think this would be a good use of action surge, but it is interesting nonetheless. I think this question boils down to if preparing a reaction attack is counted as you attacking on your turn and just delaying it or not.